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Gokhann
 Post subject: Re: Toshiba m2 died
PostPosted: December 30th, 2023, 20:58 
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Picture 5


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fzabkar
 Post subject: Re: Toshiba m2 died
PostPosted: December 30th, 2023, 21:30 
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https://www.ti.com/packaging/en/docs/partlookup.tsp?partmarking=cbz

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fzabkar
 Post subject: Re: Toshiba m2 died
PostPosted: December 30th, 2023, 23:51 
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GU = DZ2J068 / DZ2S068 = 6.8V Zener for constant voltage / surge absorption circuit:

https://www.mouser.com/datasheet/2/315/DZ2J06800L_E-1142209.pdf
https://docs.rs-online.com/7c3e/0900766b80e4a742.pdf

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Gokhann
 Post subject: Re: Toshiba m2 died
PostPosted: January 1st, 2024, 16:01 
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fzabkar wrote:
Gokhann wrote:
So you found that broken ic? Wow how? That makes sense since i cant measure anything on components

That broken IC probably has nothing to do with the root cause.

Is there a short between 3.3Vin and Ground?


What to you think can be, if there is no short between 3V and GND?
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Lardman
 Post subject: Re: Toshiba m2 died
PostPosted: January 1st, 2024, 16:06 
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Gokhann wrote:
What to you think can be, if there is no short between 3V and GND?
The angry pixies are not where they are supposed to be - put the thermal camera down and start tracing the pixie path from the 3.3v input until they disappear. :roll:

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https://www.usbrecovery.co.uk/
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fzabkar
 Post subject: Re: Toshiba m2 died
PostPosted: January 1st, 2024, 16:07 
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Gokhann wrote:
What to you think can be, if there is no short between 3V and GND?

I don't have a crystal ball.

fzabkar wrote:
What are the voltages at the input and output of the current limit switch? (ZSA0)

What are the voltages at each of the inductors adjacent to the PMIC? (RT5045A)

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Gokhann
 Post subject: Re: Toshiba m2 died
PostPosted: January 1st, 2024, 16:23 
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Lardman wrote:
Gokhann wrote:
What to you think can be, if there is no short between 3V and GND?
The angry pixies are not where they are supposed to be - put the thermal camera down and start tracing the pixie path from the 3.3v input until they disappear. :roll:


Weird thing is, that i cant measure anything. I place the black probe on the usb c socket and tried to measure all over the m2 disk, nothing to measure. but if i swap it with my own m2, every thing works
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fzabkar
 Post subject: Re: Toshiba m2 died
PostPosted: January 1st, 2024, 16:34 
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Gokhann wrote:
Lardman wrote:
Gokhann wrote:
What to you think can be, if there is no short between 3V and GND?
The angry pixies are not where they are supposed to be - put the thermal camera down and start tracing the pixie path from the 3.3v input until they disappear. :roll:


Weird thing is, that i cant measure anything. I place the black probe on the usb c socket and tried to measure all over the m2 disk, nothing to measure. but if i swap it with my own m2, every thing works

Can you at least measure the 3.3V input? If not, then where is the 35.1C temperature coming from?

Is your own SSD the same model?

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Gokhann
 Post subject: Re: Toshiba m2 died
PostPosted: January 1st, 2024, 16:45 
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i guess the 35 deg is from my enclosure. the 3.3V seems to be underneath the (bottom side of the pcb).

I will try to remasure it now.

No mine is from intel. the broken one is from toshiba
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Gokhann
 Post subject: Re: Toshiba m2 died
PostPosted: January 1st, 2024, 18:15 
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i tried to track the 3.3V and i just cant find it any voltages on pcb, now i wonder if my multimeter is playing with me.
I have fluke i can borrow tomorrow. i will remeasure tomorrow
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fzabkar
 Post subject: Re: Toshiba m2 died
PostPosted: January 1st, 2024, 18:56 
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Measure the voltage of a CR2032 lithium coin cell like the one on your motherboard.

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fzabkar
 Post subject: Re: Toshiba m2 died
PostPosted: January 1st, 2024, 19:22 
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Measure Vin and Vout of IC "ZSA0".


Attachments:
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Gokhann
 Post subject: Re: Toshiba m2 died
PostPosted: January 1st, 2024, 19:41 
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Usb c kabel were bad. I changed the cabel now the m2 ssd gets hot.

Here is a pic


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Gokhann
 Post subject: Re: Toshiba m2 died
PostPosted: January 1st, 2024, 19:52 
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fzabkar wrote:
Measure Vin and Vout of IC "ZSA0".


Vin and Vout is 3.2V.
The m2 adapter tries to start up but since there is a malfunction it start and stop every 5 sec. so the vin and vout voltages toggles between 3.2V and 2~.
its just a value, i think it starts so quickly up again , so the 2something volt is not important.

A ram chip gets hot, but im not sure if anything cause it. hard to feel.
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fzabkar
 Post subject: Re: Toshiba m2 died
PostPosted: January 1st, 2024, 19:57 
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Measure the resistances between ground and each of the inductors at the PMIC. One of the outputs could be overloaded.

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Gokhann
 Post subject: Re: Toshiba m2 died
PostPosted: January 1st, 2024, 20:17 
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fzabkar wrote:
Measure the resistances between ground and each of the inductors at the PMIC. One of the outputs could be overloaded.


Maesured compard to GND

77 K
0.268 K
4.8 K


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fzabkar
 Post subject: Re: Toshiba m2 died
PostPosted: January 1st, 2024, 20:26 
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There are 3 more inductors, 2 below the PMIC and 1 at the bottom left corner.

If all those are OK, then measure the resistance between Vout and Ground for each of the load switches marked "24". Maybe that chipped load switch is actually faulty.

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Gokhann
 Post subject: Re: Toshiba m2 died
PostPosted: January 2nd, 2024, 11:56 
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fzabkar wrote:
There are 3 more inductors, 2 below the PMIC and 1 at the bottom left corner.

If all those are OK, then measure the resistance between Vout and Ground for each of the load switches marked "24". Maybe that chipped load switch is actually faulty.


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File comment: Chip 24 , out to GND
m2-3.jpg
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File comment: Pmic inductor resistance to GND
m2.jpg
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Gokhann
 Post subject: Re: Toshiba m2 died
PostPosted: January 2nd, 2024, 12:14 
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Joined: December 30th, 2023, 17:17
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Location: Denmark
Now i just wanted to measure the voltage all over, and there is no 3.3V haha. Damn, and its the working cable. so there is something wrong with it.

regarding the broken 24 chip, just for test purpose, dont you think i could short the in and out and see if the harddrive shows up on pc?
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fzabkar
 Post subject: Re: Toshiba m2 died
PostPosted: January 2nd, 2024, 13:41 
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I can't see any obvious overloads. Could it be that your USB port has shut down? These ports are usually protected by resettable polyswitches or polyfuses.

https://i.stack.imgur.com/ISM4w.jpg

Many DR techs use a USB current/voltage monitor to measure the current draw of USB devices.

https://m.media-amazon.com/images/I/713ZajmsVyL._AC_UF894,1000_QL80_.jpg
https://m.media-amazon.com/images/I/71AwTaD37DL._AC_UF894,1000_QL80_.jpg

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Last edited by fzabkar on January 2nd, 2024, 13:55, edited 1 time in total.

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